The author´s use of apostrophe in the poem "85", engages readers by addressing them directly. For example, in the line "...you might ask, how do I explain it?", the author is talking directly to the reader making he/she become envolved and identifies by the question in this case.
It is worth mentioning, apostrophe is a literary device which is emotional and persuasive in that it mephasizes feelings, in this case the love/hate the auhtor feels serving poetic imagery.
This literary tool has been used by authors such as Shakespeare in "Sonnet 18", Edgar Allan Poe, Mary Shelly in Frankestein. There´s a well known poem by Jane Taylor in which this device is clearly used:
“Twinkle, twinkle, little star,
How I wonder what you are.
Up above the world so high,
Like a diamond in the sky.”